DOC-0017-10-EN: AC20 Series PROFINET IO Option
14 (47) DOC-0017-10-EN-A 27.03.2023
Network Status (NS) LED
• No Connection with IO Controller
• Connection with IO Controller Established
• IO Controller in RUN state
• Connection with IO Controller Established
• IO Controller in STOP state or IO Bad Data
• IRT Synchronization Not Finished
• Used by Engineering Tools to Identify the Ethernet
Node on the Network
• Major Internal Error (this indication is combined
with a RED Module Status LED)
• Expected Identification Differs from Real
Identification
Module Status (MS) LED
• No power or Module in SETUP or NW_INIT state.
• Module has shifted from the NW_INIT state
• Diagnostic event(s) present
• Device in state Exception.
RED/GREEN
• Major internal error (this indication is combined
with a red network status LED)
Link/Activity (L/A) LED
• No Link, No Communication present.
• Ethernet Link Established, No Communication
present
• Ethernet Link Established, Communication
Present